
MAX921–MAX924
Ultra Low-Power,
Single/Dual-Supply Comparators
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13
INB+
INB-
INC+
INC-
IND+
IND-
INA+
INA-
OUTA
OUTB
OUTC
OUTD
5
4
7
6
11
10
13
12
750mV
1V
500mV
250mV
250k
182k
9
2
1
16
15
REF
8
V-
V+
GND
14
MAX924
3
+5V
VIN
R1
R2
1.182V
330
Ω
330
Ω
330
Ω
330
Ω
INB+
INB-
INC+
INC-
IND+
IND-
INA+
INA-
OUTA
OUTB
OUTC
OUTD
10k
V+
GND
MAX924
+5V
10k
REF
V-
N.C.
-5V
0 FOR VINA < 0V
1 FOR VINB > 0V
VINA
VINB
VINC
VIND
Figure 7. Bar-Graph Level Gauge
Figure 8. Level Shifter: ±5V Input to CMOS Output